Burst Water Pipes a Ching of the Past You can now make all water pipes as secure from bursting in winter as in summer. This pneumatic system is the only one which successfully prevents the annoy ing and costly bursting of water pipes. It has solved a great economic problem. Highly endorsed by Architects Engineers and Municipal Officials. No new house should be completed without this system and all house owners should avail them selves of this 'ounce of prevention' in season. THE PNEUMATIC DOME MANUFACTURING COMPANY 501 E Street Northwest Washington D. C. COAL MINING and HANDLING MACHINERY. The
Burst Water Pipes a Ching of the Past You can now make all water pipes as secure from bursting in winter as in summer. This pneumatic system is the only one which successfully prevents the annoy ing and costly bursting of water pipes. It has solved a great economic problem. Highly endorsed by Architects Engineers and Municipal Officials. No new house should be completed without this system and all house owners should avail them selves of this 'ounce of prevention' in season. THE PNEUMATIC DOME MANUFACTURING COMPANY 501 E Street Northwest Washington D. C. COAL MINING and HANDLING MACHINERY. The JEFFREY MANUFACTURING CO. COLUMBUS 0. NOW READY. LIQUID AIR AND The Liquefaction of Gases. By Prof. T. O'CONOR SLOANE. PRICE $ helping in forwarding the higher scientific education of the people. The world at large is now interested in natu ral science and since its earliest developments nothing with the possible exception of Electricity has excited such widespread attention as Liquid Air. This book contains the full theory of the subject. It gives the entire history of the liquefaction of gases from the earliest times to the present and also con excited the wonder of audiences all over the country. It shows how liquid air like water is carried hundreds of miles and is handled in open buckets ; also the For mation of frost on bulbs-Filtering liquid air -Dewar's tumbler made of frozen whisky-Alcohol icicle :'.1.:rcury frozen-Frozen mercury hammer-Liquid air us ammunition-Liquid air as basis of an explosive Burning electric light carbon in liquid air-Burning steel pen in liquid air-Carbon dioxide solidified-At mospheric air liquefied-Magnetism of oxygen. It tells what may be expected from liquid air in the near future. It gives the history and biography of thd subject from earliest times. This is not only a work of scientific interest and au thority but is intended for the general reader being written in a popular style and will be easily understood MUNN & CO. PUBLISHER
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